<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			*{
				margin: 0;
				padding: 0;
			}
			html{
				height: 100%;
				overflow: hidden;
			}
			body{
				height: 100%;
				overflow: hidden;
			}
			#wrap{
				height: 100%;
				border: 1px solid deeppink;
				overflow: auto;
			}
			#pink{
				position: absolute;
				left: 0;
				top: 0;
				width: 200px;
				height: 200px;
				background: pink;
			}
		</style>
	</head>
	<body>
		<!--初始包含块：是一个视窗大小的矩形！！-->
		<div id="wrap">
			<div id="pink">
				
			</div>
			<div id="test" style="height: 3000px;">
			
			</div>
		</div>
	</body>
</html>
